package com.example.ai.controller;


import com.example.ai.config.RedisChatMemory;
import com.example.ai.entity.vo.MessageVO;
import com.example.ai.repository.impl.RedisChatHistoryRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.ai.chat.messages.Message;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RequiredArgsConstructor
@RestController
@RequestMapping("/ai/history")
public class ChatHistoryController {


    private final RedisChatHistoryRepository redisChatHistoryRepository;

    private final RedisChatMemory chatMemory;

    /**
     * 查询会话历史列表
     *
     * @param type 业务类型，如：chat,service,pdf
     * @return chatId列表
     */
    @GetMapping("/{type}")
    public List<String> getChatIds(@PathVariable("type") String type) {
        return redisChatHistoryRepository.getChatIds(type);
    }

    /**
     * 根据业务类型、chatId查询会话历史
     *
     * @param type   业务类型，如：chat,service,pdf
     * @param chatId 会话id
     * @return 指定会话的历史消息
     */
    @GetMapping("/{type}/{chatId}")
    public List<MessageVO> getChatHistory(@PathVariable("type") String type, @PathVariable("chatId") String chatId) {
        List<Message> messages = chatMemory.get(chatId, Integer.MAX_VALUE);
        if (messages == null) {
            return List.of();
        }
        return messages.stream().map(MessageVO::new).toList();
    }
}